docs: def is_enabled():
      """
      Check if `ufw` is enabled
  
      :returns: True if ufw is enabled
      """
      output = subprocess.check_output(['ufw', 'status'],
                                       universal_newlines=True,
                                       env={'LANG': 'en_US',
                                            'PATH': os.environ['PATH']})
  
      m = re.findall(r'^Status: active\n', output, re.M)
  
      return len(m) >= 1